Python实现删除Android工程中的冗余字符串

Android提供了一套很方便的进行资源（语言）国际化机制，为了更好地支持多语言，很多工程的翻译往往会放到类似crowdin这样的平台上。资源是全了，但是还是会有一些问题。

哪些问题

以下使用一些语言进行举例。其中values为工程默认的资源。

1.某语言的资源和某语言限定区域的资源之间。如values-fr-rCA存在于values-fr相同的字符串，这种表现最为严重。
2.某语言的资源和默认的资源之间。values-fr存在与values相同的字符串，可能原因是由于values-fr存在未翻译字符串导致

为什么要去重

洁癖，容不下半点冗余。

解决思路

1.如果values-fr-rCA存在于values-fr相同的字符串，去除values-fr-rCA中的重复字符串，保留values-fr。这样可以保证在values-fr-rCA下也可以正确读取到资源。

2.如果values-fr存在与values相同的字符串。如去除values-fr中得重复字符串，保留values的条目。

Py脚本

#!/usr/bin/env python

# coding=utf-8

from os import listdir,path, system

from sys import argv

try:

    import xml.etree.cElementTree as ET

except ImportError:

    import xml.etree.ElementTree as ET


def genRegionLangPair(filePath):

    basicLanguage = None

    if ('values' in filePath) :

        hasRegionLimit = ('r' == filePath[-3:-2])

        if (hasRegionLimit):

            basicLanguage = filePath[0:-4]

            if (not path.exists(basicLanguage)) :

                return None

            belongsToEnglish =  ("values-en" in basicLanguage)

            if (belongsToEnglish):

                #Compare with the res/values/strings.xml

                return (path.dirname(basicLanguage) + '/values/strings.xml', filePath + "/strings.xml")

            else:

                return (basicLanguage + '/strings.xml', filePath + "/strings.xml")

    return None
def genLangPair(filePath):

    def shouldGenLanPair(filePath):

        if (not 'values' in filePath ):

            return False

        if('dpi' in filePath):

            return False

        if ('dimes' in filePath):

            return False

        if ('large' in filePath):

            return False

        return True
    if(shouldGenLanPair(filePath)):

        basicLanguage = path.dirname(filePath) + '/values/strings.xml'

        targetLanguage = filePath + '/strings.xml'

        if (not path.exists(targetLanguage)):

           return None
        if (not path.samefile(basicLanguage,targetLanguage)) :

            return (basicLanguage, targetLanguage)

    return None
def genCompareList(filePath):

    compareLists = []

    for file in listdir(filePath):

        regionPair = genRegionLangPair(filePath + '/' + file)

        if (None != regionPair):

            compareLists.append(regionPair)
        languagePair = genLangPair(filePath + '/' + file)

        if (None != languagePair) :

            compareLists.append(languagePair)
    return compareLists
def getXmlEntries(filePath):

    root = ET.ElementTree(file=filePath).getroot()

    entries = {}

    for child in root:

        attrib = child.attrib

        if (None != attrib) :

            entries[attrib.get('name')] = child.text

    print 'xmlEntriesCount',len(entries)

    return entries
def rewriteRegionFile(sourceEntries, filePath):

    if (not path.exists(filePath)):

        return

    ET.register_namespace('xliff',"urn:oasis:names:tc:xliff:document:1.2")

    tree = ET.ElementTree(file=filePath)

    root = tree.getroot()

    print root

    totalCount = 0

    removeCount = 0

    unRemoveCount = 0

    print len(root)

    toRemoveList = []

    for child in root:

        totalCount = totalCount + 1

        attrib = child.attrib

        if (None == attrib):

            continue
        childName = attrib.get('name')
        if (sourceEntries.get(childName) == child.text):

            removeCount = removeCount + 1

            toRemoveList.append(child)

        else:

            unRemoveCount = unRemoveCount + 1

            print childName, sourceEntries.get(childName), child.text

    print filePath,totalCount, removeCount,unRemoveCount
    for aItem in toRemoveList:

        root.remove(aItem)
    if (len(root) != 0 ):

        tree.write(filePath, encoding="UTF-8")

    else:

        command = 'rm -rf %s'%(path.dirname(filePath))

        print command

        system(command)

def main(projectDir):

    lists = genCompareList(projectDir + "/res/")
    for item in lists:

        print item

        src = item[0]

        dest = item[1]

        rewriteRegionFile(getXmlEntries(src),dest)
if __name__ == "__main__":

    if (len(argv) == 2) :

        main(argv[1])

如何使用

python removeRepeatedStrings.py your_android_project_root_dir